the fbi begins the investigation by interviewing 30 american survivors now at u.s. military base in germany. the attacker struck at 10:00 p.m. local time to stay within 15 minutes inside the compound firing on main building. the ambassador christopher stephens and the information manager sean smith and a security officer began destroying classified documents smoke and flames from a grenade exploded on the roof drove the security officer from the building, he went back into fine stevens and smith. >>> when he got to sean smith he was dead he pulled him from the building he went back and with additional security forces but unable to locate a ambassador stevens before the fire overcame the building. >>> the battle shifted to an annex to other americans were killed apparently outnumbered and outgunned by their attackers. >>> at the remains of the ambassador stevens and three american scheduled to come home tomorrow. elizabeth cook cbs 5 >>> the a media camps outside of the southern california house where the film maker is believed to live there was movement inside the h